Technical description and composition of the POLARLINE 50PL52TC-SM TV, panel type and modules used. The composition of the modules.POLARLINE LED
Model: 50PL52TC-SM
Chassis / Version: LD.M538.A
Panel: CV500U1-T01
LED backlight: CY_HL + HT_49D_3528 MS-L2190 V1
LED driver (backlight): integrated into PSU
Power Supply (PSU): PW.108W2.801
MainBoard: LD.M538.A
Specifications 50PL52TC-SM
POLARLINE 50PL52TC-SM
General recommendations for TV LCD LED repair
Possible manifestations of defects
- The POLARLINE 50PL52TC-SM TV does not turn on, does not respond to the remote control and control panel buttons, does not light or blink indicators.
With such manifestations, the power module PW.108W2.801 usually fails. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for possible partial or complete breakdown.
In case of any breakdowns of semiconductors in the secondary circuits, the converter can usually operate normally in an emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and, less often, the current sensor in the source of the key.
Breakdown of power switches (MosFet) in switching sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency setting or damper, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM), if they do not have visible damage to the case and an outright short circuit between the terminals, are usually checked by replacing.
- There is no picture, but there is sound and reaction to the remote control. Or, for a second, the image may appear immediately after switching on.
The backlight of the matrix (LED-panel) is usually faulty in these cases. The reason may be found in a malfunction of the LEDs, in a violation of the contact connections of the LED strips, or in providing them with power (LED driver).
It is impossible to check the LED bars for a break without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters tend to light a single 3V LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as an indicator of serviceability. In faulty LEDs, the zener diode will either be cut off or broken through in the K / Z.
- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
Repair or diagnostics of the LD.M538.A motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software).
We remind users again! Attempts to repair the POLARLINE 50PL52TC-SM TV on your own without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
The main features of the POLARLINE 50PL52TC-SM device:Installed matrix (LED-panel) CV500U1-T01.
A converter combined with a power supply is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the POLARLINE 50PL52TC-SM TV is carried out by the PW.108W2.801 power module, or its analogs.
MainBoard - the main board (motherboard) is an LD.M538.A module.
POLARLINE 50PL52TC-SM TV with LCD CV500U1-T01, diagonal size 50 "(127 cm) 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum brightness, is 4000: 1 The LCD panel of the TV is equipped with direct backlighting with LEDs - Direct LED.
There is a convenient function for recording TV programs on a USB-drive with subsequent viewing at another time (TimeShift).
You can watch movies in the highest UHD quality at a resolution of 3840x2160 pixels in the 4K UHD standard.
50PL52TC-SM TV has built-in SMART software and pre-installed Android Operating System. Internet connection can be made via Wi-Fi wireless connection. Supported media file formats: MP3, WMA, MPEG4, HEVC (H.265), Xvid, DivX, MKV, JPEG.
Speaker power 14 W (2x7 W) is provided by two speakers. Uses NICAM stereo signal processing system and Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, VGA, HDMI 1.4 x3, USB x2, Ethernet (RJ-45), Wi-Fi 802.11n. A headphone output is provided.
The digital tuner is capable of receiving television channels in DVB-T MPEG4, DVB-C, DVB-T2 standards.
Dimensions: with stand 1122x689x225 mm, without stand 1122x658x83 mm.
TV weight: 9.2 kg.
Attention! The CV500U1-T01 panel of the POLARLINE 50PL52TC-SM LED TV is an expensive and unreliable element.
Do not allow any impacts on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV non-repairable.